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Error code reference

Electrolux Dryer Error Code 0xB3

Power Supply Amplitude Out of Range (Too Low)

Electrolux codesElectrolux dryer codes

Power Supply Amplitude Out of Range (Too Low) – Line Voltage too Low or Main Board fault.

First step from the service manual

Verify that the Power Supply is per the product specification.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What 0xB3 means on a Electrolux dryer

Error code 0xB3 on an Electrolux dryer indicates that the power supply amplitude has been detected as out of range on the low side. The main control board continuously monitors incoming line voltage to ensure the dryer operates within its specified electrical parameters. When the sensed voltage falls below the acceptable threshold, the board flags this fault to protect internal components and prevent erratic or unsafe operation.

The two primary sources of this fault are an actual low-voltage condition at the supply circuit and a failure within the main control board itself. A true low-voltage condition can result from a weak utility feed, a partially failed circuit breaker, loose or corroded wiring connections at the outlet, terminal block, or dryer power cord, or shared circuit loading that drags voltage down. Electric dryers typically require a dedicated 240V circuit in North America, and any significant deviation below that nominal voltage can trigger this code.

If the incoming line voltage measures within the product's specified range at the outlet and at the terminal block inside the dryer, the fault points toward the main control board's voltage sensing circuitry. A board with a failed voltage sensing component can report a false low-voltage condition even when supply power is correct. Diagnosis should always begin at the power supply before condemning the board, as replacing a board on a circuit with persistent low voltage will not resolve the underlying problem.

Source: manufacturer service documentation.

Common causes of 0xB3

  1. 01

    Low or Unstable Incoming Line Voltage

    Wiring / connection

    The utility supply or home wiring is delivering voltage below the dryer's specified operating range. Check voltage at the wall outlet with a multimeter under load to confirm the supply is within specification.

  2. 02

    Partially Tripped or Weak Circuit Breaker

    Part replacement

    A double-pole breaker for the dryer circuit can lose one leg, dropping the 240V supply significantly. Reset the breaker fully and measure voltage on both legs; replace the breaker if it fails to hold rated voltage.

  3. 03

    Loose, Corroded, or Damaged Power Cord or Terminal Block Connections

    Wiring / connection

    High-resistance connections at the power cord terminals or the dryer's internal terminal block cause a voltage drop that the control board detects as low amplitude. Inspect all connections for heat damage, corrosion, or looseness.

  4. 04

    Faulty Dryer Power Cord

    Part replacement

    A damaged or undersized power cord can introduce resistance that reduces the voltage reaching the control board. Inspect the cord for burns, pinching, or damage and test continuity across each conductor.

  5. 05

    Main Control Board Fault

    Part replacement

    If incoming line voltage is confirmed to be within specification at the terminal block, the board's internal voltage sensing circuit may have failed and is reporting a false low-voltage condition. Board replacement is required in this case.

See the test procedure for each cause

Frequently asked questions about 0xB3

What does 0xB3 mean on a Electrolux dryer?
Code 0xB3 means the dryer's main control board has detected that the incoming line voltage is below the acceptable operating range. This is described as a Power Supply Amplitude Out of Range fault on the low side. It can result from an actual low-voltage condition at your home's electrical circuit or from a failure in the main control board's voltage sensing components. The dryer will not operate normally while this condition is present.
How do I fix error code 0xB3 on my Electrolux dryer?
Start by measuring the voltage at the dryer's wall outlet or the terminal block inside the dryer using a multimeter to confirm it meets the product's specified line voltage requirement. Also check the circuit breaker for a partial trip and inspect all power cord and terminal block connections for looseness or corrosion. If the supply voltage is confirmed correct and connections are secure, the main control board is the likely cause and will need to be replaced.
Is it safe to use my Electrolux dryer while code 0xB3 is active?
You should not continue operating the dryer with this fault active. Low line voltage can cause motors and heating components to draw excessive current, generating heat that can damage internal parts or create a fire hazard. Resolve the electrical supply issue or board fault before resuming use.
Will resetting my Electrolux dryer clear the 0xB3 error code?
A power reset may temporarily clear the code, but it will return if the underlying cause is not corrected. If the line voltage remains below specification or the control board's sensing circuit is faulty, the fault will be detected again as soon as the dryer powers up and begins monitoring. Always address the root cause rather than relying on resets.
How much does it cost to repair an Electrolux dryer showing error code 0xB3?
Repair costs vary depending on the root cause. If the fix involves tightening connections or resetting a circuit breaker, there may be no parts cost at all. A replacement circuit breaker or power cord typically runs in the range of $15 to $80 in parts. If the main control board requires replacement, parts alone can range from $100 to $300 or more, with additional labor costs if a technician is needed.

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